.menu li{
    width: 100%;
    line-height: 40px;
    cursor: pointer;
}
.menu i{
    line-height: 40px;
    margin-right: 10px;
}
.menu li:not(.level-1){
    display: none;
}

.menu .item-1{
    text-indent: 8px;
    border-bottom: 1px solid #e5e5e5;
}
.menu .item-2{
    text-indent: 16px;
    border-bottom: 1px solid #e5e5e5;
}
.menu .item-3{
     text-indent: 24px;
    border-bottom: 1px solid #e5e5e5;
 }

